Biology and morphometrics of blue butterfly, Lampides boeticus infesting cowpea, was studied. The eggs were disc-shaped, finely sculptured and pale green in colour. The mean egg period observed was ± days. There were four larval instars. The later instars were found attended by red ants in the field. The first instar caterpillar was fringed with hairs while second instar had sparse hairs. The third and fourth instar caterpillars were slug like, pea green in colour. The average sizes of the head capsule from first to fourth instars were found to be , , and mm, respectively. The average larval, pre-pupal and pupal duration lasted for , and days, respectively. Mating commenced on the appearance of bright sunlight. The mean longevity of adult was ± days, respectively. | Life cycle of the pulse blue butterfly Lampides boeticus Linnaeus Lepidoptera Lycaenidae on cowpea
